The four color deck is way better IMO, and is usually the first thing I change when trying a new site. I agree with others that it is worth it just to see flushes a little easier.
I used to do 4 but changed a while back because 2 color is normal and I been hitting the live tables along more lately. I think I'm faster now more than ever on reads. Good luck and slay em.
It is better to play with four colors, so that you do not go to suffer a confusion, and it costs you some money, the other time it happened to me and they paid me, I swore and perjured that I had color, and it was an illusion... jajajajjajajaja
I thin this is only question of costum. It will not be difference in your modal play.
The same form of the color off the cards or of the color of the table.